rt2x00: Unify GPIO register field namings

The various rt2x00 drivers use different methods to name the different
GPIO register fields indicating the GPIO pin value and the fields
indicating the direction.
Start using a unified naming scheme for the GPIO register fields:
	- <csr>_VAL<x> for fields indicating the GPIO pin value.
	- <csr>_DIR<x> for fields indicating the GPIO pin direction.

Signed-off-by: Gertjan van Wingerde <gwingerde@gmail.com>
Acked-by: Ivo Van Doorn <ivdoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/rt2x00/rt2500pci.h b/drivers/net/wireless/rt2x00/rt2500pci.h
index 2aad7ba..9c10068 100644
--- a/drivers/net/wireless/rt2x00/rt2500pci.h
+++ b/drivers/net/wireless/rt2x00/rt2500pci.h
@@ -789,16 +789,18 @@
 
 /*
  * GPIOCSR: GPIO control register.
+ *	GPIOCSR_VALx: GPIO value
+ *	GPIOCSR_DIRx: GPIO direction: 0 = output; 1 = input
  */
 #define GPIOCSR				0x0120
-#define GPIOCSR_BIT0			FIELD32(0x00000001)
-#define GPIOCSR_BIT1			FIELD32(0x00000002)
-#define GPIOCSR_BIT2			FIELD32(0x00000004)
-#define GPIOCSR_BIT3			FIELD32(0x00000008)
-#define GPIOCSR_BIT4			FIELD32(0x00000010)
-#define GPIOCSR_BIT5			FIELD32(0x00000020)
-#define GPIOCSR_BIT6			FIELD32(0x00000040)
-#define GPIOCSR_BIT7			FIELD32(0x00000080)
+#define GPIOCSR_VAL0			FIELD32(0x00000001)
+#define GPIOCSR_VAL1			FIELD32(0x00000002)
+#define GPIOCSR_VAL2			FIELD32(0x00000004)
+#define GPIOCSR_VAL3			FIELD32(0x00000008)
+#define GPIOCSR_VAL4			FIELD32(0x00000010)
+#define GPIOCSR_VAL5			FIELD32(0x00000020)
+#define GPIOCSR_VAL6			FIELD32(0x00000040)
+#define GPIOCSR_VAL7			FIELD32(0x00000080)
 #define GPIOCSR_DIR0			FIELD32(0x00000100)
 #define GPIOCSR_DIR1			FIELD32(0x00000200)
 #define GPIOCSR_DIR2			FIELD32(0x00000400)